package cn.tedu.sp06.controller;

import cn.tedu.sp01.pojo.Item;
import cn.tedu.sp01.pojo.Order;
import cn.tedu.sp01.pojo.User;
import cn.tedu.web.util.JsonResult;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.client.RestTemplate;

import java.util.List;

@RestController
@Slf4j
public class RibbonController {
    @Autowired
    private RestTemplate rt;

    @GetMapping("/item-service/{orderId}")
    @HystrixCommand(fallbackMethod = "getItemsFB")
    public JsonResult<List<Item>> getItems(@PathVariable String orderId) {
        // 调用远程的商品服务，获得订单的商品列表
        // {1} - RestTemplate自己定义的一种站位符格式

        /*
        注册中心的注册表：
        item-service ---- localhost:8001,localhost:8002

        从注册表得到 item-service 对应的多个地址，然后在多个地址之间来回调用
         */
        return rt.getForObject("http://item-service/{1}",
                    JsonResult.class,
                    orderId); //用 orderId 填充占位符 {1}
    }

    @PostMapping("/item-service/decreaseNumber")
    @HystrixCommand(fallbackMethod = "decreaseNumberFB")
    public JsonResult<?> decreaseNumber(@RequestBody List<Item> items) {
        return rt.postForObject(
                "http://item-service/decreaseNumber",
                items,
                JsonResult.class);
    }
    
    @GetMapping("/user-service/{userId}")
    @HystrixCommand(fallbackMethod = "getUserFB")
    public JsonResult<User> getUser(@PathVariable Integer userId) {
        return rt.getForObject("http://user-service/{1}",
                JsonResult.class,
                userId);
    }
    @GetMapping("/user-service/{userId}/score") //    ?score=1000
    @HystrixCommand(fallbackMethod = "addScoreFB")
    public JsonResult<?> addScore(@PathVariable Integer userId,
                                  @RequestParam Integer score) {
        return rt.getForObject("http://user-service/{1}/score?score={2}",
                JsonResult.class,
                userId, score);
    }

    @GetMapping("/order-service/{orderId}")
    @HystrixCommand(fallbackMethod = "getOrderFB")
    public JsonResult<Order> getOrder(@PathVariable String orderId) {
        return rt.getForObject("http://order-service/{1}",
                JsonResult.class,
                orderId);
    }

    @GetMapping("/order-service/")
    @HystrixCommand(fallbackMethod = "addOrderFB")
    public JsonResult<?> addOrder() {
        return rt.getForObject("http://order-service/",JsonResult.class);
    }

    ////////////////////////////////////////////////////////

    public JsonResult<List<Item>> getItemsFB(String orderId) {
        return JsonResult.err().msg("获取订单的商品列表失败");
    }
    public JsonResult<?> decreaseNumberFB(List<Item> items) {
        return JsonResult.err().msg("减少商品库存失败");
    }
    public JsonResult<User> getUserFB(Integer userId) {
        return JsonResult.err().msg("获取用户失败");
    }
    public JsonResult<?> addScoreFB(Integer userId,Integer score) {
        return JsonResult.err().msg("增加用户积分失败");
    }
    public JsonResult<Order> getOrderFB(String orderId) {
        return JsonResult.err().msg("获取订单失败");
    }
    public JsonResult<?> addOrderFB() {
        return JsonResult.err().msg("添加订单失败");
    }
}
